.wrapper{
    width: 960px;
    margin: 0 auto;
    border: 1px solid #444;
}

.r_button{
  background: url("../img/right_button.png") no-repeat top left;
    width: 54px;
    height: 92px;
    float: left;
}
.l_button{
    background: url("../img/left_button.png") no-repeat top right;
    width: 54px;
    height: 92px;
    float: right;
}
